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- Ultrasonographic Assessment of the Pronator Quadratus Muscle after Surgical Treatment for Distal Radius Fractures
- Dong Hyuk Choi, Hyun Kyun Chung, Ji Won Lee, Cheol Hwan Kim, Yong Soo Choi
- J Korean Fract Soc 2017;30(2):69-74. Published online April 30, 2017
- DOI: https://doi.org/10.12671/jkfs.2017.30.2.69
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Abstract
PDF - PURPOSE
This study was to assess the morphological changes of the pronator quadratus (PQ) muscle using an ultrasonography in the volar locking plate fixation group and in the percutaneous K-wire fixation group for distal radius fracture, and to evaluate the impact on clinical outcomes.
MATERIALS AND METHODS
Fifty-four patients who received surgical treatment for distal radius fracture were enrolled in this study. They were divided into two groups according to treatment modality: Group 1 included 34 patients who underwent internal fixation with volar locking plate and Group 2 included 20 patients with percutaneous K-wire fixation. Thickness of the PQ muscle was measured using an ultrasonography at the final follow-up. We evaluated the outcomes using the Mayo wrist score, wrist range of motion, and grip strength at the final follow-up.
RESULTS
Compared with the uninjured side, thickness of the PQ muscle showed 31.9% of mean atrophy in Group 1 and 11.4% in Group 2. The atrophy of PQ muscle was severe in Group 1 (p=0.01). However, there was no significant difference in the mean Mayo wrist score between the two groups (83.1±10.9 in Group 1 and 80.2±8.9 in Group 2, p=0.28), except a mild limitation of pronation in Group 1.
CONCLUSION
The healed PQ muscle from fracture itself after distal radius fracture revealed a morphological atrophy. Moreover, the volar locking plate resulted in greater atrophy of the PQ muscle, but there was no specific impact on clinical outcomes.
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- The Fate of Pronator Quadratus Muscle after Volar Locking Plating of Unstable Distal Radius Fractures
- Chae Hyun Lim, Heun Guyn Jung, Ju Yeong Heo, Young Jae Jang, Yong Soo Choi
- J Korean Fract Soc 2014;27(3):191-197. Published online July 31, 2014
- DOI: https://doi.org/10.12671/jkfs.2014.27.3.191
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Abstract
PDF
- PURPOSE
The purpose of this study is to evaluate the pronator quadrates muscle in patients who underwent internal fixation with a volar locking plate for unstable distal radius fractures.
MATERIALS AND METHODS
Forty patients who underwent internal fixation with a volar locking plate for unstable distal radius fracture were enrolled. We evaluated the clinical results according to the Mayo wrist score, the wrist range of motion, and the grip strength at the last follow-up. Using ultrasonography, muscle thickness of the pronator quadrates was compared between injured and uninjured arm.
RESULTS
Bone union was achieved in all cases. The mean Mayo wrist score was 82.79 points. The grip strength of the injured arm was decreased to 89.1% of the uninjured side. The decrease of pronation range of the injured wrist motions was significant (82.3degrees, p=0.004). There was significant atrophy of the pronator quadrates muscle on the injured side (injured side: 3.19 mm, uninjured side: 4.72 mm, p=0.001); and the decrement of muscle thickness in pronator quadrates showed an association with the Mayo wrist score (r=-0.35, p=0.042).
CONCLUSION
These results suggest that continuity of the muscle is maintained after use of the volar locking plating for unstable distal radius fractures with repair of pronator quadrates; however, there is atrophy of pronator quadrates muscle and limitation of pronation in the injured wrist.
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